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Electric motor

a technology of electric motors and motors, applied in the direction of anti-hunting elements, positive displacement liquid engines, supports/enclosements/casings, etc., can solve the problem that the current measures are not suitable for motors of a small construction typ

Inactive Publication Date: 2008-01-08
GRUNDFOS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0014]Since the voltage delivered by a Seebeck element increases depending of the prevailing temperature difference, and thus also the electrical energy delivered by the Seebeck element, it is useful to arrange the Seebeck element where most waste heat occurs or the highest temperatures are to be expected. This with a motor is usually in the winding wire which is why it is desirable to attach one side of

Problems solved by technology

These measures at present are not suitable for motors of a small construction type for reasons of costs.

Method used

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Embodiment Construction

[0026]An electric motor 1 is shown in FIG. 1 in the form of an asynchronous motor which is activated by a frequency converter 2. The frequency converter 2 in a known manner consists of an input circuit 3, of an intermediate circuit 4 as well as of a power circuit 5. The supply voltage is rectified in the input circuit 3, brought to a constant voltage level in the intermediate circuit and in the power circuit 5 impinges the motor windings via suitable switches. The waste heat of the motor 1 is supplied to a Seebeck element 6 which here represents one or more Seebeck elements connected in series or parallel. The heat flow between the electric motor 1, the Seebeck element 6 and a heat sink is shown symbolized by interrupted double arrow lines. The Seebeck element 6 is connected to a DC / DC converter 7 which stabilizes the voltage of the Seebeck element 6 which fluctuates depending on the temperature difference, to the voltage level of the intermediate circuit 4. The DC / DC converter 7 vi...

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Abstract

The electric motor is equipped with an electronic control, for example in the form of a frequency converter (2) and comprises at least one Seebeck element (6) whose one side is connected to the motor (1) in a heat-conducting manner and whose other side is in heat-conducting connection with a cooling medium. The electrical output power of the Seebeck element (6) is led to the electronic control (2) of the motor (1).

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of priority under 35 U.S.C. § 119 of EP 03011406.0 filed May 20, 2003, the entire contents of which are incorporated herein by reference.FIELD OF THE INVENTION[0002]The invention relates to an electric motor with an electronic control.BACKGROUND OF THE INVENTION[0003]Electric motors nowadays are applied in almost all technical fields. One therefore strives to increase the efficiency of such motor and thus their economic efficiency. Measures increasing the efficiency are worthwhile, in particular with motors which run for a long operational time period, such as drive motors of pump units, compressors, ventilators or likewise, since corresponding savings in consumption are to be expected.[0004]Modem electric motors have an electronic control which is connected in series to the actual motor in order from the essentially constant direct or alternating voltage available on the mains side to produce a voltage...

Claims

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Application Information

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IPC IPC(8): H02P27/04F04D13/06F04D29/58H02K5/128H02K9/22H02K11/00H02P4/00
CPCF04D13/06F04D29/584F04D29/588H02K9/22H02K11/0094H02P4/00H02K5/128F04D13/0686F04D25/06F04D25/068F04D29/5806H02K9/227
Inventor VADSTRUP, PIERRE
Owner GRUNDFOS